/*
* Copyright (C) 2019 Tianjin KYLIN Information Technology Co., Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/&gt;.
*
*/


#include "scrollareawidget.h"
#include <QDebug>
#include <QMouseEvent>
#include <QApplication>

ScrollAreaWidget::ScrollAreaWidget()
{
    setSizePolicy(QSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding));
    setWidgetResizable(true);
    QScrollBar *pScrollbar = new QScrollBar;
    setVerticalScrollBar(pScrollbar);
    setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);  //隐藏横向滚动条
    setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);     //显示纵向滚动条

    this->verticalScrollBar()->setProperty("drawScrollBarGroove",false);
}

void ScrollAreaWidget::mousePressEvent(QMouseEvent *event)
{
    m_pressedPos = event->pos();
}

void ScrollAreaWidget::mouseMoveEvent(QMouseEvent *event)
{
    int distance = (event->pos() - m_pressedPos).y();
    verticalScrollBar()->setValue(verticalScrollBar()->value() - distance);
    m_pressedPos = event->pos();
}
